AU2018256667A1 - Jaw crusher - Google Patents

Abstract

JAW CRUSHER The present disclosure belongs to the field of crusher technologies, and in particular, relates to a jaw crusher liner with steel bonded hard alloy cast therein, comprising a fixed jaw plate 2 and a moving jaw plate 1, wherein a crushing chamber 3 is formed between the fixed jaw plate 2 and the moving jaw plate 1, the inner side of the fixed jaw plate is a fixed working surface 5, the inner side of the moving jaw plate is a moving working surface 6, and both the fixed working surface and the moving working surface are toothed surfaces; and further comprising hard alloy columns 4, wherein the hard alloy columns are cast into the working surface of the fixed working surface and the moving working surface. 0000000 00000 0000000o 0 ooooooo ooooo 0oooo 000000000000 0010 00000 00000000 0000 00 00 0 00 000 0000000000 0000 000 0000000 00 000 00 00 0000000000000 00000000000 00000 0000000000 0000 000000000000000 000000000000100000 0000000000000000000000 O0000000000000 000000000 00000000000 000000 o~ 00000--00 0000000 0000 0000000000000000 00000 000000.oogoogoo 00 0000000 0 000ooo00000g 00000 u u 00000000000 I~~~~~~~~~ 000000000 00000000 00000000 I00ooo.oOoo1-0,.Ooooo I 000000000 00000000 00000000000 000 0000000000000 000000000 00000 0000000000 000 0000gogoo00 0000000000000000000 0000000110000000000000001 0000-00000000000 .000000

Description

JAW CRUSHER

Related Applications [0001] The current application claims priority from Chinese Utility Model No. 201821079685.3 filed 9 July 2018, which is herein incorporated by reference in its entirety.

Field [0002] The present disclosure belongs to the field of crusher technologies, and in particular, relates to a jaw crusher liner with steel bonded hard alloy cast therein.

Background [0003] Jaw crushers, also known as jaw crushers (hereinafter the “jaw crusher”), are mainly used for crushing various ores and bulk materials to intermediate particle sizes, and have been extensively used in mines, metallurgy, construction materials, roads, railways, water conservation, chemical industry, and other industries. The maximum compression strength of crushed materials is 320 MPa. The jaw crushers have performance characteristics such as high crushing ratio, uniform product particle sizes, simple structures, reliable performance, easy repair, and low operating costs.

[0004] The working portion of a jaw crusher includes two jaw plates, one being a fixed jaw plate (fixed jaw) vertically (or slightly inclined outwardly at the top end) secured to a front wall of the machine body, and the other being a moving jaw plate (moving jaw), which is positioned inclinedly and forms, with the fixed jaw plate, a crushing chamber (working chamber) that is large at the top and small at the bottom. The moving jaw plate performs periodic reciprocating movements relative to the fixed jaw plate, and the two are sometimes separated apart and sometimes close to each other. When the two are separated apart, a material enters the crushing chamber, and the finished product is discharged from the bottom; when the two are close to each other, the material between the two jaw plates are squeezed, bent, and split, thereby crushed.

[0005] The fixed jaw plate and the moving jaw plate of a jaw crusher form working surfaces of the crusher, and ores are crushed in the crushing chamber formed by the fixed jaw plate and the moving jaw plate. Surfaces of conventional fixed jaw plates and moving jaw plates are all

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2018256667 02 Nov 2018 smooth surfaces, and since they don’t have sufficient hardness, the fixed jaw plate and the moving jaw plate tend to be damaged in the process of hitting ores.

Summary of the Invention [0006] It is an object of the present invention to wholly or partly overcome one or more of the above disadvantages of the prior art, or at least to provide a useful alternative.

[0007] Embodiment(s) of the present invention seeks provides a jaw crusher liner with steel bonded hard alloy cast therein to address that the hardness may not be sufficient and the fixed jaw plate and the moving jaw plate may tend to be damaged.

[0008] According to an aspect of the present invention, there is provided a jaw crusher liner with steel bonded hard alloy cast therein, comprising a fixed jaw plate and a moving jaw plate, wherein a crushing chamber is formed between the fixed jaw plate and the moving jaw plate, the inner side of the fixed jaw plate is a fixed working surface, the inner side of the moving jaw plate is a moving working surface, and both the fixed working surface and the moving working surface are toothed surfaces; and further comprising hard alloy columns, wherein the hard alloy columns are cast into the fixed working surface and the moving working surface.

[0009] Preferably, the hard alloy columns are made of a titanium carbide steel bonded hard alloy.

[0010] Preferably, hard alloy columns of different diameters and different lengths are selected according to different abrasion curves of the fixed working surface and the moving working surface, different hardness of ores, and different particle sizes of incoming materials and discharge materials, the columns are regularly arranged at different center spacing, and the hard alloy columns are columns with a length of 30 mm-100 mm, a diameter less than 25 mm, and an arrangement center spacing of 40-60 mm.

[0011] Preferably, the hard alloy columns are columns with a top end surface and a bottom end surface being the same.

[0012] Preferably, the hard alloy columns have a length of 30 mm-100 mm and a diameter less than 25 mm.

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2018256667 02 Nov 2018 [0013] Preferably, the hard alloy columns are arranged at a center spacing of 40-60 mm.

[0014] Preferably, the hard alloy columns are integrated with the fixed working surface and the moving working surface, and the hard alloy columns extend above the fixed working surface and the moving working surface by 0.5 mm-1 mm.

[0015] Steel bonded hard alloys are made through a powder metallurgical process by using one or more carbides (commonly including TiC, WC, TaC, and NbC) as the hard phase and using high-speed steel or alloy steel as the bonding phase. The carbide phase results in excellent abrasion resistance and temperature resistance of the hard alloys, while the steel bonding phase offers processing properties for the hard alloys, including thermal processability, cutting processability, malleability, and solderability. Therefore, steel bonded hard alloys are a novel type of engineering materials between alloy steel and hard alloys.

[0016] Compared with tungsten carbide steel bonded hard alloys, titanium carbide-based steel bonded hard alloys have a series of advantages: TiC has excellent physical and chemical properties, including high hardness, oxidation resistance, corrosion resistance, low specific weight, and good thermal stability; moreover, crystal grains have a low tendency to grow in the sintering process, and the crystal grains are typically round, such that the alloys have excellent performance in use and are a type of hard phase materials with relatively ideal properties. Another important advantage is that the sources of raw materials thereof are abundant, the manufacturing process is simple, the cost is low, the density is only 6.10 g/cm³, and the carbon content in TiC can vary in a wide range, which leads to great flexibility in terms of the composition.

[0017] In preferred embodiments, steel bonded hard alloy columns are provided on surfaces of both the fixed jaw plate and the moving jaw plate, which may improve the strength and hardness of the liner, may prevent damages to the fixed jaw plate and the moving jaw plate by ores during ore crushing, may extend the service life of the fixed jaw plate and the moving jaw plate, may reduce the maintenance cost, and may achieve excellent results in implementations. Embodiment(S) of the technical solution is favorable for extensive applications.

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2018256667 02 Nov 2018

Brief Description of Drawings [0018] Preferred embodiments of the invention will be described hereinafter, by way of example only, with reference to the accompanying drawings, wherein:

[0019] FIG. 1 is a schematic structural diagram of a side of an embodiment of the present invention;

[0020] FIG. 2 is a schematic structural diagram of a moving jaw plate according to an embodiment of the present invention;

[0021] FIG. 3 is a schematic structural diagram of a fixed jaw plate according to an embodiment of the present invention.

[0022] Wherein: 1 - moving jaw plate, 2 - fixed jaw plate, 3 - crushing chamber, 4 - hard alloy columns, 5 - fixed working surface, and 6 - moving working surface.

Detailed Description [0023] A jaw crusher liner with steel bonded hard alloy cast therein, comprising a fixed jaw plate 2 and a moving jaw plate 1, wherein a crushing chamber 3 is formed between the fixed jaw plate 2 and the moving jaw plate 1, the inner side of the fixed jaw plate 2 is a fixed working surface 5, the inner side of the moving jaw plate 1 is a moving working surface 6, and both the fixed working surface 5 and the moving working surface 6 are toothed surfaces; and further comprising hard alloy columns 4, wherein the hard alloy columns 4 are cast into the fixed working surface 5 and the moving working surface 6.

[0024] The hard alloy columns 4 are made of a titanium carbide steel bonded hard alloy.

[0025] Hard alloy columns of different diameters and different lengths are selected according to different abrasion curves of the fixed working surface and the moving working surface, different hardness of ores, and different particle sizes of incoming materials and discharge materials, the columns are regularly arranged at different center spacing, and the hard alloy columns 4 are columns with a length of 30 mm-100 mm, a diameter less than 25 mm, and an arrangement center spacing of 40-60 mm.

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2018256667 02 Nov 2018 [0026] The hard alloy columns 4 are columns with a top end surface and a bottom end surface being the same.

[0027] The hard alloy columns 4 have a length of 30 mm-100 mm and a diameter less than 25 mm.

[0028] The hard alloy columns 4 are arranged at a center spacing of 40-60 mm.

[0029] The hard alloy columns 4 are integrated with the fixed working surface 5 and the moving working surface 6, and the hard alloy columns extend above the fixed working surface 5 and the moving working surface 6 by 0.5 mm-1 mm.

[0030] The hard alloy columns 6 contain 35-55% titanium carbide, 1.2-2.5% nickel powder, 1% molybdenum powder, 8% ferromanganese, 0.5% graphite powder, 32-52% water atomized iron powder and carbonyl iron powder, and 0.5% chromium carbide.

[0031] In practical operations, steel bonded hard alloys of different materials need to be selected according to different depths of abrasion surfaces, different abrasion mechanisms, and different actual situations of mines, and steel bonded hard alloys having different contents of titanium carbide need to be selected according to abrasion curves, so as to ensure overall flexural strength and hardness of a liner.

[0032] Steel bonded hard alloys are a novel type of hard alloys that are developed based on hard alloys. Steel bonded hard alloys are a type of steel-based composite materials made through a powder metallurgical process by using steel as the bonding phase and a hard compound as the hard phase.

[0033] The hard phase TiC of a steel bonded hard alloy has high hardness (3200 HV), high melting point (3150 degrees), and stability at high temperature, leading to advantages including high hardness, good adhesion resistance, and good abrasion and heat resistance. Due to these performance characteristics, steel bonded hard alloys have been extensively used on abrasion resistant products. As the quality of rare metal resources, such as tungsten and cobalt, deteriorates and the quantity thereof becomes increasingly scarce in China, it will certainly be an important development trend in the future that steel bonded hard alloys are used as substitutes for hard alloys.

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2018256667 02 Nov 2018 [0034] An example process for preparing the hard alloy columns according to the present invention is provided below:

[0035] Step I: preparation of steel bonded hard alloy columns. First, a steel bonded hard alloy powder is ground and pressed into a desired size and shape, and is molded through sintering for later use;

[0036] Step II: preparation of a sand mold. Bury a mold into a sand box to prepare a mold chamber, and then nail the dried steel bonded hard alloy columns into the sand on the side of the mold chamber via steel nails welded thereto, to secure the steel bonded hard alloy columns, and control the temperature of the sand box constant in the range of 200°C-400°C;

[0037] Step III: casting. First, smelt the fixed jaw plate and the moving jaw plate according to their chemical compositions, then heat the mold chamber secured with the steel bonded hard alloy columns, and pour the smelted metal liquid into the heated mold chamber to complete casting;

[0038] Step IV: knock-out. Perform knock-out and sand shakeout to obtain a composite panel, then cut off the steel nails, clean sand off the liner surface, and polish and make the liner surface smooth;

[0039] Step V: thermal treatment. Place the polished liner into a heating oven and heat to 1080°C, keep the temperature constant for 2-3 hours, then take out the liner and quickly place it into water, and when it is cooled to a predetermined temperature, take out the liner to end the process.

[0040] The embodiments of the present invention have been described in detail above, but they are only preferred embodiments of the present invention, which shall not be regarded as limitations to the implementation scope of the present invention. Any equivalent variations and improvements made within the scope of the present disclosure shall be encompassed by the present invention

Claims (7)

1. A jaw crusher liner with steel bonded hard alloy cast therein, wherein the liner comprises a fixed jaw plate and a moving jaw plate, wherein a crushing chamber is formed between the fixed jaw plate and the moving jaw plate, the inner side of the fixed jaw plate is a fixed working surface, the inner side of the moving jaw plate is a moving working surface, and both the fixed working surface and the moving working surface are toothed surfaces; and further comprising hard alloy columns, wherein the hard alloy columns are cast into the fixed working surface and the moving working surface.

2. The jaw crusher liner with steel bonded hard alloy cast therein according to claim 1, wherein the hard alloy columns are made of a titanium carbide steel bonded hard alloy.

3. The jaw crusher liner with steel bonded hard alloy cast therein according to claim 1 or 2, wherein hard alloy columns of different diameters and different lengths are selected according to different abrasion curves of the fixed working surface and the moving working surface, different hardness of ores, and different particle sizes of incoming materials and discharge materials, the columns are regularly arranged at different center spacing, and the hard alloy columns are selected from columns with a length of about 30 mm-100 mm, a diameter less than 25 mm, and an arrangement center spacing of 40-60 mm.

4. The jaw crusher liner with steel bonded hard alloy cast therein according to claim 3, wherein the hard alloy columns are columns with a top end surface and a bottom end surface being the same.

5. The jaw crusher liner with steel bonded hard alloy cast therein according to claim 2 or 4, wherein the hard alloy columns have a length of 30 mm-100 mm and a diameter less than 25 mm.

6. The jaw crusher liner with steel bonded hard alloy cast therein according to claim 2, 4 or 5, wherein the hard alloy columns are arranged at a center spacing of 40-60 mm.

7. The jaw crusher liner with steel bonded hard alloy cast therein according to any one of the preceding claims, wherein the hard alloy columns are integrated with the fixed working surface

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2018256667 02 Nov 2018 and the moving working surface, and the hard alloy columns extend above the fixed working surface and the moving working surface by 0.5 mm-1 mm.